Stop mechanism for reliefographs.



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' FRANK DE MINIGO, OF NEW YORK, N. Y., ASSIGNOE TOPOLLARD-ALLING MANUFAC- TUBING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK. I

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specification of Letters Patent. Pgtgnted June 13,1916,

Application filed September 2, 1913.- SerialITo. 787,770.

To all whom it may concern:

Be it known that I, FRANK DE MINICO, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Stop Mechanism for Reliefographs, of which the following is a specification.

This invention relates to stop mechanisms for reliefographs. Such for instance as is partially shown in Letters Patent of the United States No." 875,679, granted to Frederick H. Allingdanuary 7, 1908.

The object of my improvementsis to provide means for stopping ithedie shafts of such amachine as that of the patent to Alling without jar or pound f and for positively locking those shafts in their stopped.

' positions.

To these ends my improvements comprise means illustrated in their preferred embodiment in the accompanying drawings whereinr p .Figure 1 is'a side elevation partly in section of so much of a reliefograph as will suflice to illustrate my improvements. Fig. 2 is a fragmentary sectional rear elevation on line 2-2 of Fig. 1. Fig. 3 is a rear elevation of a portion of what is shown in Fig. 2 but showing the parts in a different relation to each other. Figs. 4 and 5 are fragmentary plan views of a portion ,of what is shown in Fig. 1, illustrating some features of the operation of my improvements.

In machinesofthe character to which the present improvements pertain, it is required that the pair of spindles or die 'shafts'which are geared together be suddenly stopped when rotating at high speed any one ofa givenv plurality of predetermined positions and maintained in that position of restduring the major 'portion of one revolution of.

the lever actuating crank shaft.

Heretofore it" has been'customary in machines of this class to employ'a stop arm rigidly fixed to one of the die shafts for engagement with the selected stop pin. While this arrangement has been found serviceable, the blowlof the suddenly stopped rigid arm against the rigid pin is obviouslysevere and'the present improvements are directed toward, among other results, a reduction of the severity ofthat blow.

Before describing the invention indetail,

I desire to haveit understood that the invention is not limited to the particular construction and arrangement of parts which I have illustrated and shall hereinafter describe, and, that various changes may be made in the mechanism shown without departing from'the sp1r1t or scope of the invention, and that the phraseology which I employ is for the purpose of description and not of limitation.

In the main frame 3 of the machine are rotatably mounted upper die shaft 4 and lower-die shaft 5, havingofixed'thereto intermeshing spur gears 6 and 7 respectively.

The upper die shaft 4 is longer than the lowerdie shaft 5, and projects rearwardly to the left a distance sufiicient to present for engagement with pulley 8, friction clutch 9,

fixed by means of screw 10. to said rearwardly projecting end. Pulley Sis supported in a suitable bearing in upstanding ear 11 fixed to the rearward portion of main frame 3. Said'pulley 8 is provided with a suitable groove for belt 12 bywhich it is constantly driven from some suitable source of power not shown. Connected with pulley 8 is "a pair of diametrically opposite eccentrics 56 and 57 which by means of connecting rods 13 and 14 transmit oscillatory motion to lower lever 15 and upper lever 16, all respectively. These levers operate in a well known manner the dies in the die heads not. shown.

from gear 6 in the path of the abutments on saidiarm. For resistance to endthrust, the

source of which will appear later herein,

and to minimize thefriction caused by said endthrust, I preferably employ a ball bearing as 25 between gear 6 and arm 20. The

hub portion of arm 20 is provided with a rearwardly reaching sleeve 26having therein a helical cam slot 27 for engagement with cam roll 28 mounted on pin 29 inreaching 7 Between gear 6 and friction clutch 9, arranged concentrically about from sleeve 30. Said sleeve is mounted for endwise movement on shaft 4, and is constrained to rotation with that shaft by roll 31, pinned to said shaft in engagement with. slot'32 in said sleeve 30. Said sleeve is chambered at its outer left hand end,

Fig.1,for the reception of spring 33 for urging said sleeve'to the right, and through the instrumentality of roll 28 in engagement with camslot 27, for urging arm 20 to its normal position of, for instance, Figs. 3' and 5. To the outer end of said sleeve '30 is fixed collar 34 for engagement-with trip pin 35 of the clutch mechanism in pulley 8. Said clutch-mechanism isprovided to cause the eccentrics in engagement with connecting rods 13and 14 to make one revolution and friction clutch 9.

then stop, as fully setforth in the above mentioned patent to Ailing. Said collar- 34 is slotted at 36 and 37 to permit endwise movement thereof without interfering with The eccentrics 56 and 57 foractuating connecting rods 13 and 14 respectively, are

not rigidly secured to pulley 8 but are nor- .mally loose therefrom, a mechanism being provided to rigidly connect said eccentrics reaching from car 11 of frame 3. member 46 is preferably provided with a with said pulley and the operation of which is controlled by thearrest of" shaft 4. Said eccentrics are integralwith shaft 45, rotatable in sleeve-like bearing member 46, in-

Said

= friction sleeve 47 on which pulley 8 is rotated, A retaining plate 48 is threaded on the reduced end of bearing member 46 and engages a shoulderportion 49 in'the recessed face of pulley 8. Said recessed face of pulley '8 is provided with ratchet teeth 51. On the hub of retaining plate 48 is pivotally mounted a cam.,52 andrigidly connected to Q the reduced-endof shaft is arm 53. A

pawl 54, piv otally' mounted at on arm 53, and the heel of which may come into engagement. with ratchet teeth 51 of pulley 8, is

normally held out of such engagement by cam 52. Trip-pin 35 is yieldably supported I on arm 53 andis arranged to engage yieldable cam 52. Thus, when shaft 4 is arrested and sleeve 30 is moved to the left, collar 34 will'cause trip pin 35 to engage cam 52 and move said cam out of the planeof pawl 54 onarm 53, thus causing the heel of said pawl to engage ratchet teeth 51 of pulley 8 .55

and shaft45 to make one revolution; 7 As this clutch ,mechanismis well'known in the art. and isno part of the present improvements,

5 a moredetailed description and showing is V not-deemed necessary."

For locking gear 6 in fixed position after that'gear has been-'stopp'edby. the engagement'of stop arm '20'with one of the stop pins as 17 ,"I'provide lock arm 38 pivoted at 39 in main frame andhavingteeth as 40 5 for engagement withtheiteeth of saidgearf Said lock arm is urged to such engagement by means of pull spring 41. Said arm is normally restrained from such engagement by means of push pin 42 adjustablyifixed in ear 43 outstanding from upper lever 16.

lVhen said lever is in its downward position ofrest, as shown by dotted lines in Fig. 1,

the lower end of pin 42 will engage heel 44 of lockarm 38 thereby holding said lock arm out of engagement with gear 6 against the pull of spring 41.

The operation of my improved stop mechanism is as follows: The finger end of one of the key levers as 50 being depressed, its coacting stop pin 17 will be projected into the path of arm 20, Fig. 1, and that stop arm in its rotation with shaft 4 will presently engage that stop pin and be stopped thereby. The inertia of shaft 4 and the parts 'fixed thereto, will tend to cause that shaft to continue its rotation and such rotation Wlll be continued until abutment 23 of gear 6 engages abutment 21 of the stop arm.

This rotation of shaft 4 from the time of the engagement of the stop arm with pin 17,

until the engagementof abutment 21 of that stop arm with the abutment 23 of the gear will be under constraint, that constraint being caused by the movement of cam slot 2'? on its roll 28 against the pressure of spring '33, and whichconstraint will tend to stop shaft 4, thereby materially lessening the blow between abutments 21 and 23. The limited rotation of shaft 4 from the position of Fig. 3 to that of Fig. 2 will cause sleeve 30 tomove endwise to the left from the position of Fig. 5 to that of Fig. 4, thereby causing collar 34 to engage trip pin 35,

. whereby said gear and gear 7, meshing therewith, are locked against rotation and held rigidly in their positions of rest. Upon the descent of arm 16, pin 42 will again engage heel 44 of lock arm 38, thereby disengaging that arm from gear 6; pin 17 being simultaneously or previously withdrawn, arm 20 is urged by spring 33 to its normal position relatively to gear 6 and sleeve 30 returns to its normal position of Fig. 5. Gear 6 and shaft 4 are then free to revolve until an other stop pin is projected into the path of stop arm 20 when the described operation is repeated.

" I claim:

1. Stop mechanism including in combinatron, a rotating pulley, a rotatable shaft yieldably driven therefrom, a stop arm oscillatably mounted on said shaft, means for gradually limiting the rotary movement of said shaft relatively to said stop arm, means for stopping the stop arm, spring-actuated means for locking said shaft against rotation, and means governed by the rotationof said shaft relatively to said stop arm for releasing said locking means.

' tion, and means governed by the rotation of said shaft relatively to said stop arm for actuating said clutch.

3. Stopmechanism including in combination, a rotating pulley, a rotatable. shaft yieldably driven therefrom, a stop arm oscillatably mounted on said shaft, means for limiting the rotary movement of said shaft relatively to said stop arm, means for stopping the stop arm, a one-revolution clutch, an oscillatable arm, means for oscillating said arm from said clutch, means governed by the oscillation of said oscillatable arm for locking said shaft against rotation, and means governed by the rotation of said shaft relatively to said stop arm for actuating said clutch.

4. Stop mechanism including in combination, a rotating pulley, a rotatable shaft yieldably driven therefrom, a stop arm oscillatably mounted on said shaft, means for gradually limiting the rotary movement of said shaft relatively to said stop arm, means for stopping the stop arm, a one-revolution clutch, a spring-actuated locking arm for locking said shaft against rotation, means on said shaft for engagement With said looking arm, and means overned by the rotation of said clutch for releasing said locking arm.

5. Stop mechanism including in combination, a rotating pulley, a rotatable shaft yieldably driven therefrom, a stop arm oscillatably mounted on said shaft, means for limiting the rotary movement of said shaft relatively to said stop arm, meansfor stopping the stop arm,a one-revolution clutch, an oscillatable arm, means for oscillating said arm from said clutch, spring-actuated means for locking said shaft against rotation, means governed by the 'oscillationsof said oscillatable arm for releasing said spring aotuated locking means, and means governed by the rotation of said shaft relatively to said stop arm for actuating said clutch.

6. Stop mechanism including in combination, a rotating pulley, a rotatable shaft yieldably driven therefrom, a stop arm 'oscillatably mounted on said shaft, means for gradually limiting the rotary movement of said shaft relatively 'to said stop arm, a sleeve slidably mounted on said shaft, means for preventing rotation of said sleeve relatively to said shaft, means for sliding said sleeve relatively to said shaft, means for I stopping the stop arm, a one-revolution clutch, and means governed by tne sliding of said sleeve for actuating said clutch.

7. Stop mechanism including in combination, a rotating pulley,-.a rotatable shaft yieldably driven therefrom, a stop arm oscillatably mounted on said shaft, means for gradually limiting the rotary movement of said shaft relatively to said stop arm, a sleeve slidably mounted on said shaft, means for preventing rotation of said sleeve relatively to said shaft, means for sliding said sleeve relatively to said shaft, a one-revolution clutch, means governed by the sliding of said sleeve for actuating said clutch, spring actuated means for locking said shaft against rotation, and means governed by the rotation of said shaft relatively to said stop arm for releasing said locking means.

8. Stop mechanism including in combination, a rotating pulley, a rotatable shaft yieldably driven therefrom, a stop arm oscillatably mounted on said shaft, means for limiting the rotary movement of said shaft relatively to said stop arm, a sleeve slidably mounted on said shaft, means for preventing rotation of said sleeve relatively to said shaft, means for stopping'the stop arm,

means for urging said sleeve toward said stop arm, means on sald arm coaeting With 'means on said sleeve for sliding said sleeve relatively to said shaft during the limited rotation of said shaft relatively to said stop arm, a one-revolution clutch, means gov- V erned by the sliding of said sleeve for actuating said clutch, a spring-actuated locking arm for locking said shaft against rotation,

means on said shaft for engagementwith said locking arm, and means governed by the rotation of said clutch for releasing said locking arm. r

9. Stop mechanism including in combination, a rotating pulley, a rotatable shaft yieldably driven therefrom, a stop arm rotatably mounted on said shaft, means for limiting the rotary movement of said shaft relatively to said-stop arm, a sleeve slidably mounted on said shaft, means for preventing rotation of said sleeve relatively to said shaft, means for urging said sleeve toward said stop arm, means on said arm coacting with means on said sleeve for sliding said sleeve relatively to said shaft during the limited rotation of said shaft relatively to said stop arm, a one revolution clutch, means governed by the sliding of said sleeve for actuating said clutch, an oscillatable arm, means for oscillating said arm from said clutch, a springreleasing'said'lockingar V 10. Stop mechanism includlng 1n combiaotuated loeking arm for looking said shaft ,7 I nation, a; rotating 'pul1ey,a rotatable shaft yieldably driven therefrom, a stop arm rotatablymountedon said shaft, means for limiting the rotary movement of said shaft 7 relatively to said stop arm, a sleeve slidably i mounted on said shaft, means for preventing 'rotation of said sleeve relatively to said shaft, means for urging said sleeve toward 7 said stop arm, means on said arm coacting with means on sa1d sleeve for sliding said sleeve relat vely to sa1d shaft durlng the limited rotation of said shaft relatively to said stop arm, a one-revolution clutch, means governed by the sliding of said sleeve for actuating said clutch, an oscillatable arm,

means for oscillating said arm from said clutch, a gear fixed to said shaft, a springne'sses.

FRANK DE MINICO.

.vVitnesses WILLIAM M. STRETCH, CHAS. W. LA RUE.

7 0991:; of this patent may be obtained for five cents each, by addressing the Commissioner- 01: {Patent},

' i 7 Washington, D; 0.?" 

